Asteroid 7 Iris
Asteroid 7 Iris Sky Charts and Coordinates
This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.
More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.
High Precision Live Sky Chart
Asteroid 7 Iris Rise and Set Times
Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.
Asteroid 7 Iris Orbit Diagram
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!
View Asteroid 7 Iris in the 3D Solar System Simulator
Asteroid 7 Iris Ephemeris
The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.
| Date | MagnitudeMag | Right AscensionR.A. | DeclinationDec. | Constellation |
|---|---|---|---|---|
| 2017 Aug 12 | 8.96 | 01h 54m 51s | +19° 43’ 28” | Aries |
| 2017 Aug 13 | 8.94 | 01h 56m 03s | +19° 52’ 20” | Aries |
| 2017 Aug 14 | 8.92 | 01h 57m 15s | +20° 01’ 06” | Aries |
| 2017 Aug 15 | 8.90 | 01h 58m 23s | +20° 09’ 45” | Aries |
| 2017 Aug 16 | 8.88 | 01h 59m 32s | +20° 18’ 15” | Aries |
| 2017 Aug 17 | 8.85 | 02h 00m 39s | +20° 26’ 39” | Aries |
| 2017 Aug 18 | 8.83 | 02h 01m 45s | +20° 34’ 54” | Aries |
| 2017 Aug 19 | 8.81 | 02h 02m 50s | +20° 43’ 03” | Aries |
| 2017 Aug 20 | 8.79 | 02h 03m 55s | +20° 51’ 02” | Aries |
| 2017 Aug 21 | 8.76 | 02h 04m 57s | +20° 58’ 54” | Aries |
| 2017 Aug 22 | 8.74 | 02h 05m 57s | +21° 06’ 38” | Aries |
| 2017 Aug 23 | 8.72 | 02h 06m 57s | +21° 14’ 12” | Aries |
| 2017 Aug 24 | 8.69 | 02h 07m 55s | +21° 21’ 38” | Aries |
| 2017 Aug 25 | 8.67 | 02h 08m 53s | +21° 28’ 57” | Aries |
Distance of Asteroid 7 Iris from Earth
The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.
The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.
Light Curve of Asteroid 7 Iris
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Asteroid 7 Iris Physical Data
The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database
| Physical Parameter | Value | Relative to Earth |
|---|---|---|
| Diameter | 199.83 km | 0.0157 |
| Sideral Rotation | 7.1390 hours | 0.2983 |
| Absolute Magnitude | 5.51 | |
| Geometric Albedo | 0.2766 | |
Asteroid 7 Iris Orbital Elements
The following table lists the orbital elements of Asteroid 7 Iris at epoch 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.23144130 |
| Orbit inclination | i | 5.52316903° |
| Perihelion distance | q | 1.83361451 AU 274,304,827 km |
| Aphelion distance | Q |
2.93795207 AU 439,511,374 km |
| Semi-major axis | a |
2.38578329 AU 356,908,101 km |
| Orbital period | period |
3.6900 years 1,345.9996 days |
| Date of perihelion transit | Tp | 2017-Nov-18 08:10:28 2,458,075.8406 JD |
| Argument of perihelion | peri | 145.31451542935° |
| Longitude of the ascending node | node | 259.56450542886° |
| Mean anomaly | M | 339.84945924639° |
| Mean motion | n | 0.26745923°/day |
| Closest approach to Earth* | 2017-Oct-31 | |
| Distance of closest approach* | 0.84895471 AU 127,001,816 km |
|
* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.